Minimal equation
Minimal equation
Simplified equation
$y^2 + (x^3 + x + 1)y = x^5 - 2x^4 - 6x^3 - 3x^2$ | (homogenize, simplify) |
$y^2 + (x^3 + xz^2 + z^3)y = x^5z - 2x^4z^2 - 6x^3z^3 - 3x^2z^4$ | (dehomogenize, simplify) |
$y^2 = x^6 + 4x^5 - 6x^4 - 22x^3 - 11x^2 + 2x + 1$ | (homogenize, minimize) |
Invariants
Conductor: | \( N \) | \(=\) | \(188356\) | \(=\) | \( 2^{2} \cdot 7^{2} \cdot 31^{2} \) | magma: Conductor(LSeries(C)); Factorization($1);
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Discriminant: | \( \Delta \) | \(=\) | \(376712\) | \(=\) | \( 2^{3} \cdot 7^{2} \cdot 31^{2} \) | magma: Discriminant(C); Factorization(Integers()!$1);
|
Igusa-Clebsch invariants
Igusa invariants
G2 invariants
\( I_2 \) | \(=\) | \(964\) | \(=\) | \( 2^{2} \cdot 241 \) |
\( I_4 \) | \(=\) | \(26257\) | \(=\) | \( 7 \cdot 11^{2} \cdot 31 \) |
\( I_6 \) | \(=\) | \(7791385\) | \(=\) | \( 5 \cdot 7 \cdot 31 \cdot 43 \cdot 167 \) |
\( I_{10} \) | \(=\) | \(48219136\) | \(=\) | \( 2^{10} \cdot 7^{2} \cdot 31^{2} \) |
\( J_2 \) | \(=\) | \(241\) | \(=\) | \( 241 \) |
\( J_4 \) | \(=\) | \(1326\) | \(=\) | \( 2 \cdot 3 \cdot 13 \cdot 17 \) |
\( J_6 \) | \(=\) | \(-2572\) | \(=\) | \( - 2^{2} \cdot 643 \) |
\( J_8 \) | \(=\) | \(-594532\) | \(=\) | \( - 2^{2} \cdot 148633 \) |
\( J_{10} \) | \(=\) | \(376712\) | \(=\) | \( 2^{3} \cdot 7^{2} \cdot 31^{2} \) |
\( g_1 \) | \(=\) | \(812990017201/376712\) | ||
\( g_2 \) | \(=\) | \(9280356423/188356\) | ||
\( g_3 \) | \(=\) | \(-37346083/94178\) |
Automorphism group
\(\mathrm{Aut}(X)\) | \(\simeq\) | $C_6$ | magma: AutomorphismGroup(C); IdentifyGroup($1);
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\(\mathrm{Aut}(X_{\overline{\Q}})\) | \(\simeq\) | $D_6$ | magma: AutomorphismGroup(ChangeRing(C,AlgebraicClosure(Rationals()))); IdentifyGroup($1);
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Rational points
Known points | |||||
---|---|---|---|---|---|
\((1 : 0 : 0)\) | \((1 : -1 : 0)\) | \((0 : 0 : 1)\) | \((-1 : 0 : 1)\) | \((0 : -1 : 1)\) | \((-1 : 1 : 1)\) |
\((3 : -4 : 1)\) | \((-1 : -12 : 4)\) | \((-4 : 25 : 3)\) | \((3 : -27 : 1)\) | \((-1 : -35 : 4)\) | \((-4 : 48 : 3)\) |
Known points | |||||
---|---|---|---|---|---|
\((1 : 0 : 0)\) | \((1 : -1 : 0)\) | \((0 : 0 : 1)\) | \((-1 : 0 : 1)\) | \((0 : -1 : 1)\) | \((-1 : 1 : 1)\) |
\((3 : -4 : 1)\) | \((-1 : -12 : 4)\) | \((-4 : 25 : 3)\) | \((3 : -27 : 1)\) | \((-1 : -35 : 4)\) | \((-4 : 48 : 3)\) |
Known points | |||||
---|---|---|---|---|---|
\((1 : -1 : 0)\) | \((1 : 1 : 0)\) | \((0 : -1 : 1)\) | \((0 : 1 : 1)\) | \((-1 : -1 : 1)\) | \((-1 : 1 : 1)\) |
\((3 : -23 : 1)\) | \((3 : 23 : 1)\) | \((-1 : -23 : 4)\) | \((-1 : 23 : 4)\) | \((-4 : -23 : 3)\) | \((-4 : 23 : 3)\) |
Number of rational Weierstrass points: \(0\)
This curve is locally solvable everywhere.
Mordell-Weil group of the Jacobian
Group structure: \(\Z \oplus \Z\)
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\((-1 : 0 : 1) + (0 : 0 : 1) - (1 : -1 : 0) - (1 : 0 : 0)\) | \(x (x + z)\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(0\) | \(0.208232\) | \(\infty\) |
\((0 : 0 : 1) - (1 : 0 : 0)\) | \(z x\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-x^3\) | \(0.208232\) | \(\infty\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\((-1 : 0 : 1) + (0 : 0 : 1) - (1 : -1 : 0) - (1 : 0 : 0)\) | \(x (x + z)\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(0\) | \(0.208232\) | \(\infty\) |
\((0 : 0 : 1) - (1 : 0 : 0)\) | \(z x\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-x^3\) | \(0.208232\) | \(\infty\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\((-1 : -1 : 1) + (0 : 1 : 1) - (1 : -1 : 0) - (1 : 1 : 0)\) | \(x (x + z)\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(x^3 + xz^2 + z^3\) | \(0.208232\) | \(\infty\) |
\((0 : 1 : 1) - (1 : 1 : 0)\) | \(z x\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-x^3 + xz^2 + z^3\) | \(0.208232\) | \(\infty\) |
2-torsion field: 6.6.24109568.2
BSD invariants
Hasse-Weil conjecture: | verified |
Analytic rank: | \(2\) |
Mordell-Weil rank: | \(2\) |
2-Selmer rank: | \(2\) |
Regulator: | \( 0.032520 \) |
Real period: | \( 14.03010 \) |
Tamagawa product: | \( 3 \) |
Torsion order: | \( 1 \) |
Leading coefficient: | \( 1.368801 \) |
Analytic order of Ш: | \( 1 \) (rounded) |
Order of Ш: | square |
Local invariants
Prime | ord(\(N\)) | ord(\(\Delta\)) | Tamagawa | L-factor | Cluster picture |
---|---|---|---|---|---|
\(2\) | \(2\) | \(3\) | \(3\) | \(1 + T + T^{2}\) | |
\(7\) | \(2\) | \(2\) | \(1\) | \(1 + 5 T + 7 T^{2}\) | |
\(31\) | \(2\) | \(2\) | \(1\) | \(1 + 4 T + 31 T^{2}\) |
Galois representations
For primes $\ell \ge 5$ the Galois representation data has not been computed for this curve since it is not generic.
For primes $\ell \le 3$, the image of the mod-$\ell$ Galois representation is listed in the table below, whenever it is not all of $\GSp(4,\F_\ell)$.
Prime \(\ell\) | mod-\(\ell\) image | Is torsion prime? |
---|---|---|
\(2\) | 2.40.3 | no |
\(3\) | 3.480.12 | no |
Sato-Tate group
\(\mathrm{ST}\) | \(\simeq\) | $E_6$ |
\(\mathrm{ST}^0\) | \(\simeq\) | \(\mathrm{SU}(2)\) |
Decomposition of the Jacobian
Splits over the number field \(\Q (b) \simeq \) 6.6.481170140857.1 with defining polynomial:
\(x^{6} - x^{5} - 90 x^{4} + 237 x^{3} + 1408 x^{2} - 2640 x - 7811\)
Decomposes up to isogeny as the square of the elliptic curve isogeny class:
\(y^2 = x^3 - g_4 / 48 x - g_6 / 864\) with
\(g_4 = \frac{31616709}{2224} b^{5} - \frac{508297487}{8896} b^{4} - \frac{9846895747}{8896} b^{3} + \frac{59702831507}{8896} b^{2} - \frac{1112605409}{4448} b - \frac{327094910479}{8896}\)
\(g_6 = -\frac{6809701164035}{71168} b^{5} + \frac{13686477866341}{35584} b^{4} + \frac{8284610658751}{1112} b^{3} - \frac{3214989603474019}{71168} b^{2} + \frac{120237864274395}{71168} b + \frac{17614540690886321}{71168}\)
Conductor norm: 64
Endomorphisms of the Jacobian
Of \(\GL_2\)-type over \(\Q\)
Endomorphism ring over \(\Q\):
\(\End (J_{})\) | \(\simeq\) | \(\Z [\frac{1 + \sqrt{-3}}{2}]\) |
\(\End (J_{}) \otimes \Q \) | \(\simeq\) | \(\Q(\sqrt{-3}) \) |
\(\End (J_{}) \otimes \R\) | \(\simeq\) | \(\C\) |
Smallest field over which all endomorphisms are defined:
Galois number field \(K = \Q (a) \simeq \) 6.6.481170140857.1 with defining polynomial \(x^{6} - x^{5} - 90 x^{4} + 237 x^{3} + 1408 x^{2} - 2640 x - 7811\)
Not of \(\GL_2\)-type over \(\overline{\Q}\)
Endomorphism ring over \(\overline{\Q}\):
\(\End (J_{\overline{\Q}})\) | \(\simeq\) | an Eichler order of index \(3\) in a maximal order of \(\End (J_{\overline{\Q}}) \otimes \Q\) |
\(\End (J_{\overline{\Q}}) \otimes \Q \) | \(\simeq\) | \(\mathrm{M}_2(\)\(\Q\)\()\) |
\(\End (J_{\overline{\Q}}) \otimes \R\) | \(\simeq\) | \(\mathrm{M}_2 (\R)\) |
Remainder of the endomorphism lattice by field
Over subfield \(F \simeq \) \(\Q(\sqrt{217}) \) with generator \(-\frac{3}{139} a^{5} - \frac{16}{139} a^{4} + \frac{215}{139} a^{3} + \frac{697}{139} a^{2} - \frac{3192}{139} a - \frac{8404}{139}\) with minimal polynomial \(x^{2} - x - 54\):
\(\End (J_{F})\) | \(\simeq\) | \(\Z [\frac{1 + \sqrt{-3}}{2}]\) |
\(\End (J_{F}) \otimes \Q \) | \(\simeq\) | \(\Q(\sqrt{-3}) \) |
\(\End (J_{F}) \otimes \R\) | \(\simeq\) | \(\C\) |
Of \(\GL_2\)-type, simple
Over subfield \(F \simeq \) 3.3.47089.1 with generator \(\frac{9}{2224} a^{5} + \frac{3}{139} a^{4} - \frac{253}{1112} a^{3} - \frac{1813}{2224} a^{2} + \frac{1931}{2224} a + \frac{29243}{2224}\) with minimal polynomial \(x^{3} - x^{2} - 72 x - 209\):
\(\End (J_{F})\) | \(\simeq\) | \(\Z [\frac{1 + \sqrt{-3}}{2}]\) |
\(\End (J_{F}) \otimes \Q \) | \(\simeq\) | \(\Q(\sqrt{-3}) \) |
\(\End (J_{F}) \otimes \R\) | \(\simeq\) | \(\C\) |
Of \(\GL_2\)-type, simple